Trumpf LASERCELL 1005, Руководство оператора

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B337EN01.DOC
Laser processing
1-31
When dealing with hazardous substances, please refer to the
"Technische Regeln für Gefahrstoffe" (TRGS 560) (Technical
regulations on hazardous substances), which contain regulations
regarding air ventilation after exhausting and filtering carcinogenic
substances.
According to TRGS 560, the hazardous carcinogenic substances in
the metallic range are for example:
•
Beryllium compounds.
•
Chromium/nickel alloys.
•
Zinc chromates.
Cutting oils
Laser machining of metals treated with cutting oils may release
hydrocarbons and aldehydes. The following workplace con-
centrations were detected, for example, while using cutting oils
recommended by TRUMPF:
Galvanized steel sheet
[mg/m³]
Aluminum alloy
[mg/m³]
MAK value [mg/m³]
Acetaldehyde 0.007 0.005 90
Acetone 0.111 0.204 2400
Butanol 0.334 0.022 300
Butyl acetate 0.081 0.007 950
Decane 0.060 0.004 No limit value
Ethyl acetate 0.237 0.002 1400
Ethyl benzene 0.034 0.004 440
Formaldehyde 0.021 0.013 0.6
All hydrocarbons 2.600 1.875 No limit value
Toluene 0.057 0.120 380
Xylene 0.113 0.013 440
The above values are considerably lower than the maximum
allowed workplace concentrations (MAK values). The above
examples do not necessarily apply to other cutting oils.
Cutting oils for aluminum processing, e.g. the Wisura oil
recommended by TRUMPF, contain amine components, so
theoretically nitrosamines could be formed during laser cutting.
Corresponding investigations revealed however negative findings
in all samples: nitrosamines could not be detected.
If the cutting oils recommended by TRUMPF are used on a
chlorine-free basis, polychlorinated biphenylene (PCB) and dioxins
will not form.
Table 1-5